4/01/2011 @ 6:00PM

In Pictures: 10 Tax Filing Mistakes

Names and Social Security Numbers

Double-check Social Security numbers (and name spellings) for everyone on your return, including dependents, or the IRS may disallow your personal exemptions and child-related credits or delay processing your return. If you’re divorced, make sure you agree which spouse is claiming the kids; if both do so, the second to file will have his or her return rejected.